CN103452558A - Cutting method for sublevel caving mining - Google Patents
Cutting method for sublevel caving mining Download PDFInfo
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- CN103452558A CN103452558A CN2013103968255A CN201310396825A CN103452558A CN 103452558 A CN103452558 A CN 103452558A CN 2013103968255 A CN2013103968255 A CN 2013103968255A CN 201310396825 A CN201310396825 A CN 201310396825A CN 103452558 A CN103452558 A CN 103452558A
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Abstract
The invention discloses a cutting method for sublevel caving mining. The upward excavation is performed in a cutting roadway. The cutting method is characterized by comprising the following steps: (a), uniformly forming two rows of large-aperture medium-length holes in parallel in a position in which a cutting well is about to be dug according to the design height of the cutting well, uniformly forming two rows of blasting medium-length holes along the cutting roadway side of each row of large-aperture medium-length holes in parallel, performing millisecond blasting on the two rows of blasting medium-length holes, uniformly forming a third row of blasting medium-length holes behind the second row of blasting medium-length holes in parallel, and performing secondary blasting, wherein the large-aperture diameter of each large-aperture medium-length hole is 120mm to 200mm, a hole-edge interval is 100mm to 150mm, the aperture of each blasting medium-length hole is 55mm to 75mm, and a hole interval in the third row of blasting medium-length holes and the row distance between the second row of blasting medium-length holes and the third row of blasting medium-length holes are 500mm to 600mm; (b), uniformly forming blasting medium-length holes in sequence row by row in parallel behind the third row of holes, and performing one-row blasting one time or two-row millisecond blasting one time, wherein the hole interval and the row distance are 800mm to 1,200mm.
Description
Technical field
The present invention relates to a kind of cutting method of sublevel caving method mining.
Background technology
Sublevel caving is that the metal mine underground mining is generally applied a kind of method, the stoping operation of this mining methods all carries out in stope drift active workings, the cutting tunnel is substantially perpendicular to stope drift active workings, the cutting well has been done in cutting end, tunnel, usings the cutting well as the scope of freedom, in the cutting tunnel, cut medium-length hole blasting, pull out and just arrange the medium-length hole blasting free space, just just arranging medium-length hole blasting, carry out stoping operation.
Its cutting is to carry out in the cutting tunnel in each substoping nugget, and its cutting method is:
The one, (common law is used the overhead driller rock drilling exactly, with timber, sets up platform, carries out the driling explosion construction, drives design height first to do the cutting well in the both ends or one end in cutting tunnel by common law;
The 2nd, from cutting well position, by distance and array pitch at the bottom of less hole, on carrying out by row in the cutting lane, to fan shaped medium length hole, construct;
The 3rd, take and cut well as the scope of freedom, start to carry out each row or two row's cutting fan shaped round blastings from cutting well position.
Form cutting room by above three steps.
The problem that this cutting technique exists is:
The one, need to manually do the cutting well, cutting well height is generally all in the 15-25m left and right, has that work high above the ground, blasting fume are poisoning, wall caving roof fall an etc. potential safety hazard, drives constructional difficulties, long in time limit.The aperture explosive payload of fan shaped medium length hole is concentrated, and powder charge is not easy to control, and easily occurs bulk after explosion, and after explosion, lower cinder notch is subject to lateral openingly to affect greatlyr, sometimes is not easy lower slag.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, the technical problem to be solved in the present invention is to provide a kind of cutting method of sublevel caving method mining, does not drive specially the cutting well, does not make fan-shaped cutting construction, all by the parallel hole explosion, realizes the method for cutting.
For achieving the above object, the present invention is achieved by following technical proposals:
The cutting method of a kind of sublevel caving method mining is upwards drived in the cutting tunnel, it is characterized in that comprising the steps: that a will do cutting well position, by the cutting well design height two row large aperture medium-length holes that evenly are arranged in parallel; Its large aperture diameter is 120-200mm, and limit, hole spacing is 100-150mm; Every row large aperture medium-length hole along the cutting tunnel side two explosive broken medium-length holes that evenly are arranged in parallel, its aperture is 55-75mm; Two explosive broken medium-length holes are carried out to short-delay blasting; The 3rd explosive broken medium-length hole that evenly is arranged in parallel after second row explosion medium-length hole, pitch of holes and and second row explosion medium-length hole between array pitch be 500-600mm, carry out explosion for the second time; B after the 3rd round, the explosion medium-length hole that evenly is arranged in parallel by row successively, pitch-row and array pitch are 800-1200mm, explosive broken or once two row's short-delay blastings.
It is the scope of freedom that the parallel medium-length hole in large aperture is take in the present invention, has solved the safety problem that artificial construction's courtyard brings, and has saved manpower and materials simultaneously, with parallel medium depth holes millisecond blasting, strengthens crushing effect, forms cutting well free space.The hole explosion of the even cloth of parallel medium-length hole, guaranteed breaking size, reduces the human and material resources consumption of secondary blasting, reduced labour intensity, improved production efficiency.
The accompanying drawing explanation
Fig. 1 is the cutting method floor map of sublevel caving method mining.
Fig. 2 is explosion on line mode schematic diagram.
Wherein, the 1st, large aperture medium-length hole, the 2nd, explosion medium-length hole, the 3rd, cutting well position, the 4th, cutting tunnel, 1' are that the first row explosion medium-length hole section of detonating is other, 2' is that the second row explosion medium-length hole section of detonating is other, 3' is that the 3rd explosive broken medium-length hole section of detonating is other.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, a kind of cutting method of sublevel caving method mining, in cutting tunnel 4, upwards drive, the formation of a cutting well free space: do cutting well position 3, selecting diameter is the 120-200mm drill bit, is evenly arranged 1 liang of row of large aperture medium-length hole by cutting well design height is parallel, as the explosion scope of freedom, the diameter of each large aperture medium-length hole 1 is 120-200mm, and limit, hole spacing is 100-150mm; Two row large aperture medium-length holes 1 along the cutting tunnel 4 sides two explosive broken medium-length holes 2 that evenly are arranged in parallel, carry out short-delay blasting, two round millisecond times are less than or equal to 25ms, guarantee that the entity between each large aperture medium-length hole 1 can be fully broken, after going out only by quick-fried fallen slag, just form " cutting well " free space; For improving " cutting well " effect, rear the 3rd explosive broken medium-length hole 2 that evenly is arranged in parallel of second row explosion medium-length hole 2, it is 500-600mm that pitch of holes reaches with second row explosion medium-length hole 2 array pitch, the 3rd explosive broken medium-length hole 2 is carried out to explosion for the second time, further enlarge the scope of " cutting well " free space, and the increase compensating space in blasting, guaranteed normally carrying out of follow-up explosion medium-length hole 2 explosions.
Wherein, the height of large aperture medium-length hole 1 and explosion medium-length hole 2, according to producing the actual needs design, be generally 12-30m.One row large aperture medium-length hole 1 number is 8-10,16-20 altogether of two row.
After the 3rd explosive broken medium-length hole 2, the explosion medium-length hole 2 that evenly is arranged in parallel successively, and pitch-row and array pitch 800-1200mm; One explosive broken or once two row's short-delay blastings, guaranteed demolition effect, thereby guaranteed cutting effect.
The blasting method of this cutting method as shown in Figure 2, in explosion on line figure, first row explosion medium-length hole 2 links together and carries out short-delay blasting with second row explosion medium-length hole 2, the other 1' of the first row explosion medium-length hole section of detonating and the other 2' time delay of the second row explosion medium-length hole section of detonating differ and are less than or equal to 25ms, wherein the other 1' time delay of the first row explosion medium-length hole section of detonating is less than the other 2' of the second row explosion medium-length hole section of detonating, therefore the first explosion of the first round, explosion after the second round, explosion is slagged tap after formation " cutting well ", again to the other 3' of the 3rd explosive broken medium-length hole section of the detonating operation of being detonated, further brush large " cutting well " space.Afterwards, parallel explosion medium-length hole 2 in cutting tunnel 4 is carried out to bursting work: onepull one row or once two row's short-delay blastings, slagging tap in explosion limit, limit, has guaranteed the driling explosion effect, makes cutting everything goes well with your work to finish.
Claims (2)
1. the cutting method of sublevel caving method mining is upwards drived in the cutting tunnel, it is characterized in that comprising the steps: that a will do cutting well position, by the cutting well design height two row large aperture medium-length holes that evenly are arranged in parallel; Its large aperture diameter is 120-200mm, and limit, hole spacing is 100-150mm; Every row large aperture medium-length hole along the cutting tunnel side two explosive broken medium-length holes that evenly are arranged in parallel, its aperture is 55-75mm; Two explosive broken medium-length holes are carried out to short-delay blasting; The 3rd explosive broken medium-length hole that evenly is arranged in parallel after second row explosion medium-length hole, pitch of holes and and second row explosion medium-length hole between array pitch be 500-600mm, carry out explosion for the second time; B after the 3rd round, the explosion medium-length hole that evenly is arranged in parallel by row successively, pitch-row and array pitch are 800-1200mm, explosive broken or once two row's short-delay blastings.
2. the cutting method that sublevel caving method according to claim 1 is dug up mine, it is characterized in that: described short-delay blasting millisecond time is less than 25ms.
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| CN201310396825.5A CN103452558B (en) | 2013-09-04 | 2013-09-04 | A kind of cutting method of sublevel caving method mining |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530219A (en) * | 2019-09-06 | 2019-12-03 | 中钢集团马鞍山矿山研究院有限公司 | A kind of control blasting method reducing loss and dilution |
| CN110823034A (en) * | 2019-11-25 | 2020-02-21 | 中交路桥建设有限公司 | Soft rock foundation blasting method capable of controlling mass percentage after blasting |
Citations (6)
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|---|---|---|---|---|
| US4043596A (en) * | 1975-08-11 | 1977-08-23 | Occidental Oil Shale, Inc. | Forming shale oil recovery retort by blasting into slot-shaped columner void |
| SU1136527A1 (en) * | 1983-08-11 | 1992-01-07 | Государственный Макеевский Научно-Исследовательский Институт По Безопасности Работ В Горной Промышленности | Electric hydraulic installation for well breaking down of rock |
| RU2055303C1 (en) * | 1993-05-21 | 1996-02-27 | Московский государственный горный университет | Process of blast breaking of rocks with stratified texture in stripping |
| RU2290597C2 (en) * | 2004-06-25 | 2006-12-27 | Геннадий Буржалиевич Алиев | Method for conducting of drilling and blasting operations |
| CN102518438A (en) * | 2012-01-06 | 2012-06-27 | 中南大学 | Roof regeneration medium-length hole ore blast backfill mining method |
| CN102748029A (en) * | 2012-07-05 | 2012-10-24 | 北京矿冶研究总院 | Sectional mining method |
-
2013
- 2013-09-04 CN CN201310396825.5A patent/CN103452558B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043596A (en) * | 1975-08-11 | 1977-08-23 | Occidental Oil Shale, Inc. | Forming shale oil recovery retort by blasting into slot-shaped columner void |
| SU1136527A1 (en) * | 1983-08-11 | 1992-01-07 | Государственный Макеевский Научно-Исследовательский Институт По Безопасности Работ В Горной Промышленности | Electric hydraulic installation for well breaking down of rock |
| RU2055303C1 (en) * | 1993-05-21 | 1996-02-27 | Московский государственный горный университет | Process of blast breaking of rocks with stratified texture in stripping |
| RU2290597C2 (en) * | 2004-06-25 | 2006-12-27 | Геннадий Буржалиевич Алиев | Method for conducting of drilling and blasting operations |
| CN102518438A (en) * | 2012-01-06 | 2012-06-27 | 中南大学 | Roof regeneration medium-length hole ore blast backfill mining method |
| CN102748029A (en) * | 2012-07-05 | 2012-10-24 | 北京矿冶研究总院 | Sectional mining method |
Non-Patent Citations (1)
| Title |
|---|
| 不明: ""分段崩落采矿法的应用_续二"", 《有色矿山》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530219A (en) * | 2019-09-06 | 2019-12-03 | 中钢集团马鞍山矿山研究院有限公司 | A kind of control blasting method reducing loss and dilution |
| CN110823034A (en) * | 2019-11-25 | 2020-02-21 | 中交路桥建设有限公司 | Soft rock foundation blasting method capable of controlling mass percentage after blasting |
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| CN103452558B (en) | 2015-08-05 |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |